_dta:
  1.  ndchcpcsnoc20181 set up by Jean Roth , jroth@nber.org , 21 Dec 2017
  2.  Source: January 2018 NOC NDC-HCPCS Crosswalk 120117.xls workbook sheet
  3.  Health Care Common Procedure Coding System (HCPCS)
  4.  National Drug Code (NDC)
  5.  Average Sale Price (ASP)
  6.  Average Wholesale Price (AWP)
  7.  Hospital Outpatient Prospective Payment System (OPPS)

pkgsize:
  1.  amount in one item. (ex., For a product that is 100mcg/0.5 ml in one
      vial, the package size would be 0.5.)

pkgqty:
  1.  Package Quantity: number of items in the NDC (ex., For an NDC that is 4
      vials in a shelf pack, the package quantity would be 4.)

billunitspkg:
  1.  Billable Units Per Package: the number of billable units per package
      (ex., 100 mcg in a package divided by 5 mcg in the dosage descriptor = 20
      billable units per package.)

  obs:           215                          
 vars:            10                          5 Feb 2018 15:38
 size:        40,205                          (_dta has notes)
-------------------------------------------------------------------------------
              storage   display    value
variable name   type    format     label      variable label
-------------------------------------------------------------------------------
druggenericname str47   %47s                  Drug Generic Name
labelername     str33   %33s                  Manufacturer Name
ndc             str11   %11s                  National Drug Code (NDC) or
                                                Alternate ID
ndcdash         str13   %13s                  National Drug Code (NDC) or
                                                Alternate ID
drugname        str48   %48s                  Drug Name (Brand Name or Generic
                                                Name)
dosage          str22   %22s                  Dosage
pkgsize         double  %10.0g              * Package Size:  Amount in one item
pkgqty          byte    %10.0g              * Package Quantity:  Number of
                                                items in the NDC
billunits       int     %10.0g                Billable Units
billunitspkg    int     %10.0g              * Per Package: the number of
                                                billable units per package
                                            * indicated variables have notes
-------------------------------------------------------------------------------
Sorted by: ndc